UPDATE 2:30 p.m. EST: NBC is reporting that one TSA agent was killed and three others wounded. Airport police shot and may have killed the gunman at the scene. The shooter, whose identity has not been confirmed, was taken into custody after being shot.

State Police have shot and killed Kurt Myers, the suspect in shootings that killed four people and injured two others in Herkimer and Mohawk, New York.Shortly before 8 a.m. Thursday, State Police, FBI and a K-9 unit entered the former Glory Days bar in Herkimer where Myers had been in hiding for nea…

UPDATE 4:07 p.m. EST: Authorities have identified the gunman as William Spengler, an ex-convict who spent 17 years in prison for murdering his 92-year-old grandmother in 1980.Spengler was paroled for the crime in 1998.Police also have not located Spengler's 67-year-old sister, who lived in the house…

In the wake of the devastating shootings in Newtown, Conn. this morning, we're all left wondering why and how this act of senseless violence could possibly happen. Celebrities from across the country have been tweeting and posting Facebook updates about the shootings all morning. This is what s…